RFD 12: Teleport versioning (#5039)
RFD 12: Teleport versioning (#5039)

* RFD 12: Teleport versioning

This is a new versioning scheme for teleport releases.
It's similar to the current scheme, and keeps similar compatibility
guarantees.

The new scheme aims to be more intuitive (semver-like) to implicitly
communicate to users what the semantics of different version bumps are.

gravitational/teleport,gravitational/teleport,gravitational/teleport,gravitational/teleport,gravitational/teleport,gravitational/teleport